Clay County, Illinois, United States

Last updated: 12:05 AM CDT  ·  Refresh
25°C
Feels like 26°
Clear
▲ 34°  /  ▼ 21°
Wind
6 mph SSW
Humidity
72%
Dew Point
20°
Pressure
29.50 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
1%
Sunrise
6:23 AM
Sunset
7:23 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Clay County is currently clear at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1358 J/kg) — isolated convective development possible. Sunrise: 6:23AM · Sunset: 7:23PM.

Alerts

No active alerts for this location.
55 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
3%
1 AM
24°
3%
2 AM
24°
3%
3 AM
23°
3%
4 AM
23°
3%
5 AM
21°
3%
6 AM
21°
3%
7 AM
22°
3%
8 AM
24°
3%
9 AM
29°
3%
10 AM
31°
3%
11 AM
32°
3%
12 PM
34°
3%
1 PM
37°
3%
2 PM
37°
3%
3 PM
37°
3%
4 PM
37°
3%
5 PM
38°
3%
6 PM
37°
3%
7 PM
34°
3%
8 PM
34°
3%
9 PM
31°
3%
10 PM
30°
3%
11 PM
28°
3%
7-Day Forecast
Today
34° 21°
Clear.
Tue
38° 21°
Clear.
Wed
40° 22°
Clear.
Thu
40° 22°
Partly Cloudy with a 43% chance of rain.
Fri
41° 23°
Clear with a 39% chance of rain.
Sat
41° 23°
Clear with a 35% chance of rain.
Sun
39° 21°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 25° Clear 3% 6 mph SSW 72%
1 AM 24° Clear 3% 7 mph SSW 72%
2 AM 24° Clear 3% 7 mph SSW 74%
3 AM 23° Clear 3% 6 mph SSW 78%
4 AM 23° Clear 3% 6 mph SSW 80%
5 AM 21° Clear 3% 6 mph SSW 82%
6 AM 21° Clear 3% 6 mph SSW 82%
7 AM 22° Clear 3% 7 mph SW 81%
8 AM 24° Clear 3% 8 mph SW 71%
9 AM 29° Clear 3% 9 mph SW 61%
10 AM 31° Clear 3% 9 mph WSW 53%
11 AM 32° Clear 3% 9 mph WSW 49%
12 PM 34° Clear 3% 9 mph WSW 44%
1 PM 37° Clear 3% 8 mph WSW 41%
2 PM 37° Clear 3% 7 mph WSW 40%
3 PM 37° Clear 3% 6 mph SW 39%
4 PM 37° Clear 3% 6 mph SW 39%
5 PM 38° Clear 3% 6 mph SW 42%
6 PM 37° Clear 3% 5 mph SW 47%
7 PM 34° Clear 3% 5 mph SSW 50%
8 PM 34° Clear 3% 5 mph SSW 52%
9 PM 31° Clear 3% 6 mph SSW 54%
10 PM 30° Clear 3% 7 mph S 57%
11 PM 28° Clear 3% 8 mph S 59%
15-Day Forecast
Today
8/31
Clear
3%
21°
34°
Tue
9/1
Clear
3%
21°
38°
Wed
9/2
Clear
3%
22°
40°
Thu
9/3
Partly Cloudy
43%
22°
40°
Fri
9/4
Clear
39%
23°
41°
Sat
9/5
Clear
35%
23°
41°
Sun
9/6
Clear
19%
21°
39°
Mon
9/7
Clear
19%
17°
38°
Tue
9/8
Clear
60%
22°
39°
Wed
9/9
Drizzle
60%
21°
41°
Thu
9/10
Drizzle
60%
19°
38°
Fri
9/11
Drizzle
60%
21°
37°
Sat
9/12
Drizzle
60%
18°
34°
Sun
9/13
Drizzle
60%
18°
33°
Mon
9/14
Drizzle
60%
18°
33°
55
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
55 AQI 11.5 µg/m³
O3
Ground-level ozone
45 AQI 50 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 55 Moderate 45 55
Wed 51 Moderate 46 51
Thu 52 Moderate 44 52
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Tue Sep 1, 03:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE8 J/kg
MLCAPE32 J/kg
MUCAPE378 J/kg
SBCIN-941 J/kg
MLCIN0 J/kg
Lifted Index-0.0
Kinematics
0–6 km Shear7 kt
0–1 km Shear8 kt
Eff. Shear—
0–1 km SRH18
0–3 km SRH50
Eff. SRH—
Storm Motion21° @ 10 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index-3.8
Thermo & Levels
PWAT1.10 in
0–3 km LR3.3 °C/km
700–500 LR7.7 °C/km
Total Totals41.2
LCL928 hPa
LFC538 hPa
EL499 hPa
Freezing Lvl16,158 ft